Magnetic brick



FIG. 1 is a perspective view of a magnetic brick.

FIG. 2 is a front thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side thereof;

FIG. 5 is a right side thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken lines shown represent unclaimed subject matter and form no part of the claimed design. 

CLAIM The ornamental design for a magnetic brick, as shown and described. 